As others have been stated - let's back up to the beginning. Have you written out a plan for your end result? As a friend of mine says to his customers... " Buyers remorse is having to pay to do it the 2nd or third time". I read you want reliability, longevity, and functionality. Simple answer is read,read,read... My first build was a year in the planning and weeks to execute. My current build was a year planning and many months in my garage tinkering - and I'm still not done. Much has changed in the last 14yrs in between builds. 1st was an 05 Rubicon... Nth Degree 6"long arm, 35's and lots of smalls. "New ride" is short arm, about 3" and many smalls... UCF skids gained 3" over stock skid w lo pro mount,Nth Degree stinger, Metalcloak arms, Synergy springs 3"F/2"R, spring relocators, AEV JK 2-3" shocks and home brewed rear lower shock mounts (style of JK). I'm happy with my progress and my Rubi gets about 20K miles a year. As for the CV shaft?.. depending on how you do the rear - longarm/short arm/stinger, make sure you measure and fit for your shaft AFTER taking all the critical measurements - extended/compressed, yoke or flange style & if you decided to run a skid plate. Best thing about Jeeps is making it YOUR OWN.